Celebrities and players arrive at Manchester United Football Club, Old Trafford, Manchester for Manchester United Player Of The Year Awards 2016[Steve Searle/WENN.com]

The 31-year-old WAG announced the arrival of the couple's new tot on Twitter on Thursday (15Feb18), writing: "So Happy to welcome our Baby Boy .... Cass Mac Rooney into the world weighing a healthy 8lb 10oz. He is beautiful." Cass joins brothers Kai, eight, four-year-old Klay and Kit, two. Footballer Wayne has yet to comment on the new arrival on his social media pages. Coleen confirmed her pregnancy last August, after previously hitting out at claims she was expecting when she was photographed displaying a rounded stomach while on holiday in Portugal. "So Happy!!! ..... Never denied the news, but I was always protecting it!! Had scan & all checks are fine.....Baby number 4 is on its way," Coleen wrote. The happy announcement came after Coleen opened up about being targeted by body shamers because of her changing figure in an interview with the Daily Mail Online. Insisting she isn't worried by people making comments about her weight, Coleen said: "It doesn’t bother me. I have been in the public eye for a long time now so it doesn’t affect me. "It would hurt me if it came from someone that’s important to me like friends or family but the people who are criticising me are probably a lot heavier than I am so it doesn’t bother me anymore. There’s probably someone who is 20 stone who is judging me online so I just ignore it."